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1、Grammar and usage,Police in America have stepped up their search for a boy who went missing. 2. People have shown great interest in his disappearance due to sightings of alien visits 3. I havent seen Justin since . 4. Some people in Dover also say that they have seen aliens . 5.People have not ruled
2、 out the possibility that Justin was taken by aliens . 6. Peterson , who has taken charge of the case .,Present perfect tense,Review:,The Present Perfect Tense Form(结构):,Summary:,have/has + done,Find out some sentences which are in the present perfect tense in the text.,Mr Zhang has just bought a ne
3、w car, but he has had touble with motorists. When he returns home at night he always find that someone has parked a car outside his gate. Because of this, he has not been able to get his own car into this garage even once. He has to walk home after he parks his car. “ whats the matter? Have you boug
4、ht a car?” “ Yes, but” Mr Zhang has put up a “ No parking” sign outside his gate, but it has not any effect.,has just bought,has had,has parked,has not been,Have you bought,has put up,1. The teacher in the black jacket has left . 2. We have studied English . 3. Kung Weizheng has already finished the
5、 homework . 4. He has had his lunch . 5.I have seen the film of Titanic twice . 6.Most students have made great progress in reading . 7.Mr Feng has just returned from Britain .,Extension 1,Summary 1：,表示过去发生的某一动作对现在造成的影响或产生的结果.现在完成时这一时态强调是过去动作与现在的联系,也就是强调现在的影响和结果.通常与表示包括现在在内的时间副词 just（刚刚）, already（已经
6、）, before, yet（一般疑问：已经；否定句：还） never, ever等状语连用,Drill 1,1. I _(have) lunch already. 2. Has the train_ (arrive), yet? 3.Tome _ never_ (be to ) China. 4. The twin _just _(see) my father. 5. The twins _(see) my father just now.,have had,arrived,has,been to,has,seen,saw,1.We (study) English for about fou
7、r years. 2.We (live) in Houji Middle School since three months ago. 3.The old man _（已经死了）for two years . 5.Justin has been missing for two weeks. 6. I havent seen Guo Yi these days.,Extension 2,have studied,have lived,has been dead,Summary 2：,强调某一动作或状态从过去某一时间开始延续到现在且有可能继续下去用延续动词。通常和for, since. so fa
8、r, by now, until now, these days, in the last ten years,引导的时间状语连用。,Drill 2,1.The price _recently, but I doubt whether it will remain so. A went down, B will go down C has gone down D was going down 2. In the past few years there _ great changes in Da Miao town. A is B were C have been D will be.,Tim
9、e friends,1. 迄今为止：so far, up till now, up to now, until now. 2.最近的过去：in the last/past years, recently, lately, these few days. 3.表示一段时间的短语：all day, all this year, all ones life,瞬间性动词如 arrive, join , die, get , come, buy, sell, leave, borrow, marry 等，以及终止性动词如start, begin, finish等，在现在完成时的肯定形式中不能与 “for
10、 + 一段时间”的时间状语连用，但可以用在否定句或这些动词对应的状态动词中。为了表述这种意思，我们常用相应的延续性动词have,keep,be等来代替非延续性动词。,Tips :,Choose the right answers,1. I have joined/been in the army for ten year. 2. He has been to /gone to Dalian many times. 3. She has got married/been married to Roberts for a year. 4. All the preparations for the
11、task are completed/ have been completed ,and were ready to start. 5. He has gone/ been away for two days. 6. He has had/ has bought this book for a year.,现在完成时与一般过去时的用法比较 现在完成时属于现在时态范围，因此，不能和 yesterday, last night, two weeks ago等表示过去的时间状语连用。 The plane has arrived . （说明现在的情况：飞机在这儿） The plane arrived
12、a quarter ago. （动作发生在过去与现在无关） I have taught here for fifteen years. （表示十五年前的动作一直延续到现在，还可能会继续。） I taught here for a year. （曾在这儿教过，但现在不在这儿任教了）,Comparasion,Correct the mistakes,His father has died. (for 2 years) The football match has begun.(since9:00a.m) The twins have joined the army. (since they are
13、 18years old) My teacher has just left Nanjing. (for 3 days),His father has been dead for 2 years.,The football match has been on since 9:00 a.m.,The twins have been soldiers/ been in the army since they are 18years old.,My teacher has been away from Nanjing for 3 days,Make some sentences using the
14、present perfect tense.,Competition,translation:,不累啊？你已跳了三个小时啦！,Arent you tired？ You have been jumping for three hours.,她肯定累了，因为她一天一直在跳舞,She must be tired, for she has been dancing all day.,The Present Perfect Continuous Tense,Part B:,Form:,have/has + been + doing,Now that she is out of a job, Lucy _
15、going back to school, but she hasnt decided yet. A. had considered B. has been considering C. considered D. is going to consider,Review,链接高考,1. Where have you been? We _ for you everywhere . A. look B. were looking C. have been looking D. had been looked 2. I wonder why Jenny _ us recently. We should have heard from her by now. A. hasnt written B. doesnt write C. wont write D. hadnt written,comparison,1.The telephone _ (ring) for quite a while. Why _anyone_(answer) it? 2.They _ (practise) the song of welcome to Beijing for some time now, but they still _ (not get) it right,h
